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Drug Interactions With Lapatinib

Nicardipine
Nicardipine may increase the level of lapatinib in your blood, possibly increasing your risk of side effects. Your healthcare provider may suggest a lower lapatinib dose to prevent this from happening.
 
Pioglitazone or Rosiglitazone
Lapatinib may increase the level of pioglitazone or rosiglitazone in your blood, possibly increasing your risk of side effects. Your healthcare provider may need to decrease your pioglitazone or rosiglitazone dosage to prevent drug interactions from occurring.
 
Protease Inhibitors
Protease inhibitors may increase the level of lapatinib in your blood, possibly increasing your risk of side effects. Your healthcare provider may suggest a lower lapatinib dose if you are taking these medications together.
 
Repaglinide
Lapatinib may increase the level of repaglinide in your blood, potentially increasing your risk of side effects. Your healthcare provider may need to decrease your repaglinide dosage if you are taking these medications together.
 
Rifamycin Antibiotics
Rifamycin antibiotics may decrease the level of lapatinib in your blood, perhaps making it less effective. Talk to your healthcare provider before taking lapatinib with a rifamycin antibiotic.
 
St. John's Wort
St. John's wort may increase the level of lapatinib in your blood, possibly increasing your risk of side effects. Talk to your healthcare provider before taking St. John's wort with lapatinib.
 

Final Thoughts on Drug Interactions With Lapatinib

Not all drug interactions with lapatinib were discussed in this article. Therefore, you should talk with your pharmacist or healthcare provider about any specific drug interactions that may apply to you.
 
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